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Ka'a'awa, USA
A volcano's vestige
The mountain range that runs along eastern edge of the island of Oahu in the US state of Hawaii is all that remains of a single, enormous shield volcano. Now known as the Ko'olau Range, this 55-kilometre stretch of steepled ridges was part of the massive rim encircling Ko'olau Volcano's crater, until an eruption sent most of it plummeting into the Pacific Ocean over 10,000 years ago. Small beach communities now dot the narrow windward shore between the peaks and the Pacific, giving it a rural feel in contrast to bustling Honolulu.
A volcano's vestige
The mountain range that runs along eastern edge of the island of Oahu in the US state of Hawaii is all that remains of a single, enormous shield volcano. Now known as the Ko'olau Range, this 55-kilometre stretch of steepled ridges was part of the massive rim encircling Ko'olau Volcano's crater, until an eruption sent most of it plummeting into the Pacific Ocean over 10,000 years ago. Small beach communities now dot the narrow windward shore between the peaks and the Pacific, giving it a rural feel in contrast to bustling Honolulu.
This 55-kilometre stretch of mountains was once part of the rim encircling a massive volcano's crater.
© Warren Ishii / 500px / Getty Images 2026-09-11 08:45:51 :